Hi there :
I have been taking this med since friday of this past week. I am on a 750 once a day dose. I have had a terrible time sleeping at nite. The first night i took it i was so dizzy and sick feeling.....made me lose most of my appetite, i have this constant dry mouth and bad taste in my mouth....yuck!!! This med works good to kill the bugs in my lungs so it is worth it...at least for me if i dont get any really bad side effects from it.....My brother is allergic to it. When he took it he got so dizzy he passed out. His joints were hurting and eventually started to swell up. He had to stop the med. He is allergic to alot of meds now. So, tiredness, cant sleep, dizzy, bad TASTE in my mouth, cotton mouth, lack of appetite...are the bad things for me.....the good.....it is helping.....my lungs are not aching nearly as bad and the wheezing is easing up.......If you keep getting joint pain .......or it is causing alot of joint pain... if your joints get warm or swell i would definatley call your doc on it. You could be allergic.......it is that sensitive to the drug verses actually allergic to it line ya know......good luck with the med........i hope it stops causing you pain.....and makes you better.<img src="i/expressions/face-icon-small-smile.gif" border="0">